can not delete partitions

[wilbur1kr]

I have almost 20 partitions that I can not get rid of.
I even wiped my entire system and disconnected all drives
and 12 partitions will show up.
When I connect the original drive it will list 20 partitions.
They only show up in diskutil list but seem to cause problems
when I try to complete an update or upgrade.
I was able to load 10.8.5 and then upgrade to 10.13.6
but that is as far as I can get with out the system hanging up.
I have tried to search how to delete the partitions in terminal but I can not
get any of them to work, I have no doubt I may be doing something wrong or
just have not found to right solution.
Please halp or point me in the right direction.

 

[Middleman]

Have you tried using the following command to remove them (where disk4 is the offending drive)?

diskutil eject /dev/disk4